Machine for making tubs.



No. 815,139. PATENTED MAR. 13, 1906.

H; BRAMMER.

MACHINE FOR MAKING TUBS.

APPLICATION FILED AUG. 1. 1903.

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m IEII g I JU No. 815,139. PATENTED MAR. 13, 1906.

H. BRAMMERi MACHINE FOR MAKING TUBS.

APPLICATION FILED AUG. 1,1903.

3 SHEETS-SHEET 2.

PATENTED MAR. 13, 19-06. -H .B1LA.MMER.

MACHINE FOR MAKING'TUBS.

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4. F I I I UNITED STATES PATENT 1 HENRY BRAMMiJii, on ST. toms; MissoURI.

MAoH m E'FoR mime Tunas.

Specification of Letters Patent.

Patented March 13, 1906.

li plication filed A ngust 1,1 03. sea-airs. 167,871.

To all whom it may concern/.- Be it known that I, HENRY BRAMMER, a citizen of the United States-and a resident of St. Louis, in the State 'of Missouri, have invented certain new and useful. Improvements in Machines for Manufacturing Tubs, of which the following is a full, clear, and exacttdescripti'on; 6 My invention relates to a'machine which while particularly adapted for quickly and economically making tubs'may be used for other cooperage-work; .and its object is to avoid the necessity for the numerous hand operations now usedin the construction of tubs and to make it possible to form" and finish the tub, all excepting the inserting of the bottom therein, while the assembled parts are on the mandrel of the machine. This'I accomplish by the means hereinafter fully described and as particularly pointed out in the claims. v

.In the drawings, Figure 1 is aside elevation of my improved machine. Fig. 2-is a plan view of the same. Fig.3 is a front end view. Fig. dis a longitudinal central-section. Fig. is a perspective view of a speciand the end portion 0 from a point about the men of the style of tubs made on said ma.

chine. In the drawings, A represents asuita'ble supporting-frame, which has arising from near one end and at about the center of length of its plain level top suitable standards a a. J ournaled in bearings in the upper end of these standards is a'longitudinallshaft B, which is actuated by means of a suitable belt that engages pulley b; secured on it be,- tween its bearings, One end of the. shaft B extends through the, bearings located near v the center of the machine and extendsunsupported to and slightly beyond the adj acent end of the supporting frame toform a mandrel. The portion Oof this mandrel nearest the bearing is slightly lessin diameter than shaft B, and the portionC, extending from about the center of length thereof ,to a point just beyond the vertical'plane of the end of the supporting frame, (which it-ov'er' hangs,) is reduced to astill less diameter,

end of the supporting-frame to its extremity is still further reduced in diameter and is screw-threaded.

A circular chuck D is secured screws on portion C, which is of adiamet'er mg the spread'of the feetof the legs of the by, setslightly greater thanthat of the circle bound-,

has in its side facing the extremity of the mandrel a concentric circular groove (1, in which the feet of the legs of said tub are seated. Loosely'mounted uponthe portion C tubt'o bemanufactured by the machine and i of themand'rel is a chuck E, which is preferably less indiameter than chuck D (according to the diameter of thebottom or lower -edge of the staves of the tub) and is likewise chuck F is held in place and is forced-toward chuck D by'a suitable nut G, which preferably is provided with radiating arms for the convenience of the-operator in manipulating the same. While chucks D and E -are' mounted loosely on the shaft B, the are held stationary during the operation 0 the ma chine by means able manner.

The tub which my invention is particularly of screws'or any other suitdesigned to'operate on consists of staves slightly'tapered 'toward'their upper ends and i assembled around the axisof the tub so that 1 theupfper end ofthelatter is less in diameter Q than t V particularly adapted for washing-machines and is provided with four equidistant core lower end of the same. This tub is responding legs,awhich are 'made integrant with and consist ofthe downward extension of,'say, four staves of the'tub. The staves,

of ,the tub. are first, assembled in a suitable ironring and then slip ed concentrically. manner that the over .the mandrel in suc feet-of the longer staves forming the legs of the tub will enter the groove (1 of chuck D and at-points near the body'of the tub pass through the recesses f in the periphery of chuck E and so that the lower edges of the shorter staves forming the body of theftub willen'tergroove e of chuck E. Chuck F is thenm'oved tightly up a ainst the upper I edges of both the long an short staves by the proper manipulation of nut G, and thus clamps them..in

I I 0 place whereupon the metal ring is'removedT A suitable band 'or clamptremity of the ing-ring h of suitable diameter is then slipped over the barrel of the tub until it clamps and binds the leg portions of the longer staves and is made to bind said leg portions so tight that chuck F can, if desired, be permitted a slight longitudinal movement toward the exmandrel. When the walls of the tub are thus completed, the outer circumference thereof is planed by means of a laterally-adjustable planing device comprising a holder H, which consists of a bar the longitudinal sides of which are beveled and seated in the dovetailed groove in the upper surface of a suitable carrier 1. The outer end of j holder H is bent downward and is tapped by j a suitable bolt 'i, that extends into or through the carrier and is manipulated to adjust the holder to and from the work. The opposite end of this holder is provided with a suitable bit j, whichis secured to and extends upward at a suitable inclined angle from a plate secured to and mounted upon the inner end of the holder, substantially as shown. Carrier I consists of a substantially rectangular block which has a horizontal dovetailed groove of sufficient dimensions on its inner side and is slipped over the end of and adjustable longitudinally upon the longitudinal oblique bar I or track J, whose angular position is parallel to the angle of the sides of the tub it is desired to plane, which latter operation is accomplished by the planing device described while the tub is. being revolved rapidly and satisfactorily.

When the sides of the tub have been planed, the middle metal band for the tub is slipped over the end of the mandrel andupon the same as far back as possible by hand and is then forced still farther back as far as it will go to tighten and hold the staves together, preferably by means of a revolving disk k, which is journaled in suitable bearings located at a suitable point mediate the ends of the lever K. This lever K, which is suitably fulcrumed at one end, is swung transversely over the tub substantially as shown in Fig. 3. Its fulcrum consists of a bracket m, which is pivotally connected to lever K and secured to cross-bar M, and the ends of this bar M are adjustably secured in verticallyelongated slots of the standards N N, that arise from and have their lower ends secured to the supporting-frame A on the side of the mandrel opposite the planing device hereinbefore referred to. When the lever K is moved into the position shown in dotted lines in Fig. 3, the disk 7c comes in contact with the sides of the tub in such position that by moving the lever toward the bottom of the tub said disk will engage the forward edge of the band and forces it toward the lower edge of the tub rapidly and securely. Nut G is then removed from the end of the mandrel, and likewise chuck F, so as to leave the tub in the condition substantially as shown in Fig. 4, and the l upper edges of the tub are planed while the mandrel and the chucks D and E are rew*olv ing the tub. This I accomplish by means of a plane O, which is carried on the end of a swinging arm 0, that is pivoted or hinged to the end of a longitudinal stationary arm or bracket 71, secured to and projecting longitudinally from the standard M nearest the adjacent end of the supporting-frame Normally the plane O is in the position shown in Figs. 2, 3, and 4; but when it is desired to use the same it is swung laterally at about an angle of ninety degrees to its original position to bring the bit thereof against the edges of the tub to plane the same as desired.

After the three operations just referred to to wit, planing the outside of the tub, putting the metal band upon the same, and planing the upper edges of the sides thereofhave been accomplished a circumferential groove of suitable depth is made in the inner surface of the sides of the tub near their lower edges for the reception of the tub-bottom. The means for accomplishing this consist of a chisel or plane S, adjustable transversely in suitable guide-bearings in the end of the longer leg of a U-shaped swinging frame P. The end of the shorter arm of frame P is pivoted to suitable lugs p, secured to and projecting from the end of the supporting-frame in such manner that its movement when swung into the position shown in Fig. 4 is limited to substantially the position illustrated. When in this position, the chisel S is moved to its work and cuts the circumferential groove in the inner circumference of the walls of the tub, while the latter is rapidly revolving, by means of a lever R. This lever is fulcrumed mediate its ends to the side of the longer arm of the U-shaped frame P, and the extremity of its shortest branch is pivoted to chisel S, which latter has laterally-projecting pins projecting therefrom that extend out through slits elongated in the direction of the movement of the chisel, to the outer end of one of which the adjacent end of the lever is pivotally connected. The outer end of the longer arm of lever R is providedwith a handle, which is within convenient reach of the operator when he has moved the frame P into the position shown in Fig. 4. When the groove for the bottom of the tub has been made, frame P is swung out of the tub into the position shown in Fig. 2, whereupon the tub which is now ready to have the bottom inserted therein is removed from the mandrels by loosening and removing the clamping-ring and slightly loosening, should this e necessary, the iron band upon the tub through the medium of the disk 7c, as hereinbefore explained.

The operation of my improved machine is apparent from the foregoing description. There are details of construction, however, which may be changed or modified without IIO . periphery for the passage therethrough of elongated staves and a removable clampingring.

2. A ma'chine for the manufacture of tubs, comprising a mandrel several independentlymovable chucks mounted thereon, the chucks nearest the unsupported extremity of the mandrel having in its side farthest from said extremity a circular concentric groove, the

other chucks having in their sides facing saidv end chuck concentric grooves and the intermediate chuck having a series of transverse recesses in its periphery; and a removable clamping-ring.

3. In a machine forthe manufacture of tubs, a mandrel; several chucks mounted and independently movable thereon; means for removablyretaining the chuck nearest the unsupported end of the mandrel in proper relative position; and a removable clampingring; in combination with a U-shaped frame pivoted at the extremity ofone of its branches, and adapted to have its other branch enter longitudinally within the circumference of the work held by the chucks; and asuitable cutting device carried by said last-mentioned branch and adapted to cut a circumferential groove in the inner walls of the bottom of said work; a swinging arm mounted on a v bracket near the end of the machine; a planing device carried thereby; a lever adjustable vertically on the bracket supporting said swinging arm and capable of movement in planes at right angles to each other; and a revolving disk mounted on said lever adapted to engage the circumference of the work held by said chucks. I

4. In a machinefor the manufacture of tubs, a mandrel; several chucks mounted and independently movable on said mandrel; means for removably retaining therchuck nearest the unsupported end of. the mandrel in proper relative position; and a removable clamping-ring; in combination with a laterally-adjustable planing device; a carrier mov able in a longitudinal direction upon which said'planing device is mounted; a longitudinallyadjustable frame adapted to enter within, the inner circumference of the work held by the chucks; and a cutting device adapted to cut a circumferential groove in l the inner walls of the bottom of said work; a

swinging arm mounted on a bracket near the end of the machine; a planing device carried thereby; a lever adjustable vertically on the bracket supporting said swinging. arm and capable of movement in planes at right angles to each other; and a revolving disk mounted on said lever adapted to engage the circumference of the work held bysaid chucks.

5.' In a machine for the manufacture of tubs, a mandrel; several independently-movable chucks mounted on said mandrel means for removably retaining the chuck nearest the unsupported end of the mandrel in proper relative position; and a removable clampingring; in combination with a'lever adjustable vertically in its standards and capable of movement in planes at right angles to each other; a revoluble disk j ournaled therein and adapted to be moved bysaid lever trans-3 versely against and longitudinally upon the circumference of the Work held by the chucks alongitudinally-movable frame adapted to enter within the inner circumference of said work; and a cutting device carried by said frame and adapted to cut a circumferential groove in the inner walls of the bottom of the work; a swinging arm pivoted to a suitable bracket mounted on the standard carrying said lever, and a planing device carried by said arm ada ted to cut away the upper portion or top 0 the tub.

6. In a machine for the manufacture of tubs, a mandrel; several independently-movable chucks mounted on said mandrel; means for removably retaining the chuck nearest the unsupported end of the mandrel in proper relative position; and a removable clampingring; in combination with a transversely-adjustable planing device; a carrier movable in a longitudinal direction vupon which said planing device is mounted; a lever adjustable vertically in its standards and capable of movement in planes at right angles to each other; a revoluble disk journa'led therein and adapted to be moved by said lever transversely against and longitudinally upon the circumference of the workheld by the chucks;

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a longitudinally-movable frame adapted to enter within the inner circumference of said 7 work; and a cutting device carried by said frame and adapted toflcut a circumferential groove in the inner walls of the bottom of the work; a swinging arm-pivoted to a suitable bracket mounted on' the standard carrying said lever, and a planing device carried by said arm ada ted to cut away the upper portion or top 0 the tub. I In testimony whereof I have hereunto set my hand this 2d day of July, 1903.

'- HENRY 'BRAMMER. Witnesses: PAUL MANNY, pFRANK J. KOTSREAN. 

